Mining Waste-Driven Carbon Capture via Ocean Alkalinity Enhancement
鉱山廃棄物を利用した海洋アルカリ度向上による炭素回収 (AI 翻訳)
Nicholas Gregorich, Joseph Kalla, Mary Hannah Irwin, Saurabh Prakash Pethe, Mustafa Abbas, Zachary Coin, Mariappan Parans Paranthaman, Majbah Uddin, Shailesh Dangwal, Ramesh Bhave, Syed Z. Islam
🤖 gxceed AI 要約
日本語
鉱山廃棄物を用いた海洋アルカリ度向上によるCO2回収の新戦略を提案。模擬鉱山廃棄物の海水中溶解度は75 mg/Lで、118 mgのCO2を固定可能。技術経済分析により、CO2 1トンあたり266ドルの処理コストと試算。実海水では807ドル。pH調整により二次析出リスクを回避。
English
This study proposes a new ocean alkalinity enhancement strategy using mining waste for carbon capture. Simulated mining waste shows solubility of 75 mg/L in ASTM seawater, sequestering 118 mg CO2. Technoeconomic analysis estimates $266 per ton CO2 stored (1.4 GJ/ton). Results demonstrate potential for practical deployment.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
本論文は鉱山廃棄物を活用した海洋アルカリ度向上という新しい炭素回収手法を提示。日本の鉄鋼・セメント産業など大量のアルカリ廃棄物を排出する業種にとって、カーボンニュートラル達成のための有望なオプションとなり得る。ただし、実海域での実証や環境影響評価が今後の課題。
In the global GX context
This paper presents a novel carbon capture approach using mining waste for ocean alkalinity enhancement, with clear technoeconomic analysis. It contributes to the global discussion on scalable CDR methods, complementing existing CCUS portfolios. The cost estimates provide benchmarks for policy and investment decisions.
👥 読者別の含意
🔬研究者:Provides a new pathway for carbon capture using mining waste with detailed solubility and cost analysis.
🏢実務担当者:Offers a potential technology for companies with alkaline waste to consider for carbon offsetting.
🏛政策担当者:Highlights a promising CDR method that could be incentivized through carbon pricing or R&D support.
📄 Abstract（原文）
Ocean alkalinity enhancement (OAE) has emerged as a promising strategy to mitigate ocean acidification and reduce global warming. Traditional metal (e.g., critical materials) mining industries release alkaline waste via mining tailings with high concentrations (99.2%) of calcium and magnesium oxide (CaO, MgO). Incorporating mining waste into OAE processes is less energy intensive than processes relying on calcination of limestone for CaO production. The solubility limit of simulated mining waste in American Society for Testing and Materials (ASTM) seawater is 75 mg⋅L -1 , which can sequester 118 mg of carbon dioxide (CO 2 ). The solubility in seawater retrieved from Sunset Beach, FL was 25 mg⋅L -1 . Changes in pH, total alkalinity, and total inorganic carbon were analyzed to confirm the successful addition of simulated alkaline mining waste without the formation of secondary precipitation. This study proposes a new OAE strategy where a facility is developed nearby ocean waters that mixes alkaline waste with seawater. Subsequently, the seawater is met with previously captured, pure CO 2 to bring the pH back to 8.2 and eliminate the risks of pH shock and secondary precipitation. Technoeconomic analysis estimated an energy requirement of 1.4 GJ per ton of CO 2 stored that resulted in a processing cost of $266 per ton of CO 2 sequestered (4.2 GJ per ton, $807 per ton of CO 2 for real seawater). Results from this study underscore the potential for utilizing mining waste in OAE processes and provide a pathway for practical deployment.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.ccst.2026.100629first seen 2026-05-17 06:30:41 · last seen 2026-05-20 05:13:04
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